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Chem 105 Chapter 2 Textbook Notes

by: Maranda Butterfield

Chem 105 Chapter 2 Textbook Notes Chem 105

Marketplace > Washington State University > Chemistry > Chem 105 > Chem 105 Chapter 2 Textbook Notes
Maranda Butterfield
GPA 2.5
Chem 105

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About this Document

Notes taken from the textbook, then used to complete the online reading assignment.
Chem 105
Class Notes
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This 2 page Class Notes was uploaded by Maranda Butterfield on Monday January 19, 2015. The Class Notes belongs to Chem 105 at Washington State University taught by Finnegan in Spring2015. Since its upload, it has received 176 views. For similar materials see Chem 105 in Chemistry at Washington State University.


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Date Created: 01/19/15
gt1 10 11 12 13 14 15 16 Law of Definite Proportions All samples of a given compound regardless of their source or how they were prepared have the same proportions of their constituent elements Law of Multiple Proportions When two elements form two different compounds the masses of element b that combine with 1g of element a can be expressed as a ratio of small whole numbers Electron negatively charged low mass particle Radioactivity emission of small energetic particles from the core of a certain unstable atom a Alpha Particles negatively charged most massive b Beta Particles c Gamma Rays Nuclear Theory a Most of the atom s mass and all of its positive charge are contained in a small core called the nucleus b Most of the volume of the atom is empty space throughout which tiny negatively charged electrons are dispersed c There are as many negatively charged electrons outside the nucleus as there are positively charged particles within the nucleus so the atom is electrically neutral Neutron chargeless particle similar size to proton Isotopes atoms with same number of protons but different number of neutrons Mass number ProtonsNeutrons a Mm Chemical Symbol Metals Lower leftMiddle of periodic table a Good conductors b Malleable c Made into wires d Shiny e Tend to lose electrons NonMetals upper right of period table a Poor conductors b Tend to gain electrons Metalloids Lie along the line that divides metals and nonmetals a Some are semiconductors Group 1 Alkali Metals a Very reactive Group 2 Alkaline Earth Metals a Fairly reactive Group 17 Halogens a Very reactive nonmetals Group 12 and 1318 MainGroup Elements a Tend to lose electrons Group 312 Transition Elements a Tend to gain electrons 17 How to calculate Atomic Mass a Fraction of isotope 1 x mass of isotope 1 fraction of isotope 2 x mass of isotope 2 etc 18 Mass spectrometry a technique that separates particles according to their mass 19 1mol 602214 X1023 ltltltAvagadro s number a Equal to 12 grams of pure carbon12 20 Molar Mass a Equal to its atomic mass


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